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/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package text
import (
"regexp"
"github.com/microcosm-cc/bluemonday"
)
// '[A]llows a broad selection of HTML elements and attributes that are safe for user generated content.
// Note that this policy does not allow iframes, object, embed, styles, script, etc.
// An example usage scenario would be blog post bodies where a variety of formatting is expected along with the potential for TABLEs and IMGs.'
//
// Source: https://github.com/microcosm-cc/bluemonday#usage
var regular *bluemonday.Policy = bluemonday.UGCPolicy().
RequireNoReferrerOnLinks(true).
RequireNoFollowOnLinks(true).
RequireCrossOriginAnonymous(true).
AddTargetBlankToFullyQualifiedLinks(true).
AllowAttrs("class", "href", "rel").OnElements("a").
AllowAttrs("class").OnElements("span").
AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code").
SkipElementsContent("code", "pre")
// '[C]an be thought of as equivalent to stripping all HTML elements and their attributes as it has nothing on its allowlist.
// An example usage scenario would be blog post titles where HTML tags are not expected at all
// and if they are then the elements and the content of the elements should be stripped. This is a very strict policy.'
//
// Source: https://github.com/microcosm-cc/bluemonday#usage
var strict *bluemonday.Policy = bluemonday.StrictPolicy()
// SanitizeHTML cleans up HTML in the given string, allowing through only safe HTML elements.
func SanitizeHTML(in string) string {
return regular.Sanitize(in)
}
// RemoveHTML removes all HTML from the given string.
func RemoveHTML(in string) string {
return strict.Sanitize(in)
}
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